I have been fishkeeping for 5-6 years but I have never cycled before as when I started I inherited my dad's already established tanks. I now got a 3 Gallon Tetra Aquarium kit and am a little scared. Just need some guidance as I go through this, guess it will be like a journal. First, I should be rinsing the tank and filter and everything with warm water correct? Also, this tank is going to be used for killifish fry and so I want to make the internal filter it came with fry safe, but I can not even find where the water enters the filter, a little help please? Pictures...